Apparatus for use in twisting metal rods or bars.



L. HI SRTEL-Gz L. KISSLING. APPARATUS FOR USE IN TWISTING METAL RODS 0BBARS.

APPLICATION FILED JULY 9, 1906.

Patented Dec. 7, 1909.

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LOUIS HARTEL AND LUDWIG KISSLING, 0F REIVISCHEID, GERMANY.

APPARATUS FOR USE IN TWISTING METAL RODS 0R BARS.

Specification of Letters Patent.

Patented Dec. '7, 1909.

Application filed July 9, 1906. Serial No. 325,287.

To all whom it may concern:

Be it known that we, LoUIs HARTEL and LUDWIG KIssLING, subjects of theKing of Prussia, residing at Remscheid, in Germany, have inventedcertain new and useful Improvements in Apparatus for Use in TwistingMetal Rods or Bars, of which the following is a specification.

This invention relates to apparatus for the helical twisting of metalrods or bars. Hitherto such helical twisting has been effected by fixingthe rod, after having been heated, in a winding machine and twisting oneend either by hand or mechanically. This process, owing to the necessityof separately heating each rod, takes up a great deal of time and isvery costly, besides being applicable only to rods of limited length,and it is considerably simplified according to this invention by causingthe rods on leaving the last set of rolls, and while still incandescent,to be taken hold of by the apparatus at both ends and twisted to apreviously determined degree. This process effects a considerable savingboth in time and cost and makes it possible to deal with rods of muchgreater length than has been practicable hitherto.

A construction of apparatus according to this invention is illustrated,by way of example, in the accompanying drawing, in which Figure 1 is afront elevation, and Fig. 2 is a plan of an apparatus embodying the. invention; Fig. 3 is a section on line A-A of Fig. 4, and Fig. 4 is a planof the setting device for adjusting the degree of twisting to be carriedout.

The arrangement and the working of the apparatus are as follows:

The rod coming from the last set a of the drawing rolls driven in anysuitable manner passes through a hollow spindle 6 carried in the head 0and over a trough f arranged on supports, the vertical position .of thetrough being adjustable by means of screws 9. The trough simultaneouslyaffords support to the rod 00 and protects it against cooling. Thencethe rod 00 passes into a second spindle 0 and is fixed at each end inthe spindle heads d and b in any suitable manner, as for instance byscrews. The spindle 0 which is supported so as to be movablelongitudinally in a sleeve 0 arranged in the head 6, is provided at itsouter end with a rotatable collar 10, to which is secured, by means of acord, a weight for balancing the force acting toward the center of theapparatus, produced by the twisting of the rod. The spindles b and o areturned cured, so that the rod, fixed in the heads d and 19 is twisted.

' In order to obtain a definite and uniform pitch of the helical windingof the rod, there is provided a setting nut 1" which is movable by meansof toothed wheels 9 19 along a screw-threaded spindle s and which nut,after a certain number of revolutions, for which it may be set, operatesthe disengaging lever t of a clutch a, so that the machine is thrown outof gear. The longitudinal and non-rotative movement of the nut r isinsured in any suitable manner, for example by the insertion of a wedgeor key between it and the fork y. The exact setting in any desiredposition is effected by turn ing the setting nut "I", loosely mounted inthe fork of a slide block 1, with the spindle s stationary, whereby theslide block is caused to move, which movement can be exactly measured bymeans of an index on a scale arranged in the path a of the slide. Thetwisted rod is removed from the machine by releasing its ends from theheads I) and d and moving back the spindle 0 so as to free the end ofthe twisted rod, which can then be removed.

What we claim as our invention and desire to secure by Letters Patentis 1. In apparatus for helically twisting rods, the combination with apair of rolls of a rotatable hollow spindle adapted to receive a rodfrom the rolls, a second longitudinally adjustable spindle, removed frombut in line with the first, a rod-fixing head on each spindle, means torotate the spin dles in opposite directions, and means to automaticallystop the rotation of the spindles after a predetermined number ofrevolutions.

2. In apparatus for helically twisting rods the combination with a pairof rolls of a rotatable hollow spindle adapted to re ceive a rod fromthe rolls, a second longitudinally adjustable spindle removed from butin line with the first, a rod-fixing head on each spindle, a verticallyadjustable trough extending between the spindles, means to rotate thespindles in opposite directions and means to automatically stop therotation of the spindles after a predetermined number of revolutions.

3. In apparatus for helically twisting rods, the combination with a pairof rolls, of a rotatable hollow spindle adapted to receive a rod fromthe rolls, a second longitudinally adjustable spindle, removed from butin line with the first, a rod-fixing head on each spindle, means torotate the spindles in opposite directions, and a screw spindle drivenby said means, a traveler nut on said spindle and a clutch operatinglever in the path of the nut, substantially as set forth.

i. In apparatus for helically twisting rods, the combination with a pairof rolls, of a rotatable hollow spindle adapted to receive a rod fromthe rolls, a second longitudinally adjustable spindle, removed from butin line with the first, a rod-fixing head on each spindle, means torotate the spindles in opposite directions, a screw spindle driven bysaid means, a traveler nut on said spindle, a clutch operating lever inthe path of the nut, and means, comprisinga sliding guide, an index andscale to exactly position the nut on the spindle when the latter isstationary, so that the nut will engage the clutch-0perating lever aftera predetermined number of revolutions of the spindle, substantially asset forth.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

LOUIS HARTEL. LUDVVIG KISSLING. Witnesses OTTO KoNIG, J. A. RITTERSHAUS.

L. s. [n s.]

